In contrast to most cryptocurrency wallets, the BitShares 2.0 has a different
model to represent the blockchain, its transactions and accounts. This chapter
wants to given an introduction to the concepts of objects as they are used by
the BitShares 2.0 client. Furthermore, we will briefly introduce the API and
show how to subscribe to object changes (such as new blocks or incoming
deposits). Afterwards, we will show how exchange may monitor their accounts and
credit incoming funds to their corresponding users.

The BitShares blockchain users are requires to register each account with a unique username and a public key on the blockchain. The blockchain assigns an incremental user id and offers to resolve the name-to-id pair.